diff --git a/acme.sh b/acme.sh
index b05c341..c9cd0d1 100755
--- a/acme.sh
+++ b/acme.sh
@@ -6216,7 +6216,7 @@ Parameters:
   --force, -f                       Used to force to install or force to renew a cert immediately.
   --staging, --test                 Use staging server, just for test.
   --debug                           Output debug info.
-  --output-insecure                 Output all the sensitive messages. By default all the credentials/sensitive messages are hidden from the output/debug/log for secure.
+  --output-insecure                 Output all the sensitive messages. By default all the credentials/sensitive messages are hidden from the output/debug/log for security.
   --webroot, -w  /path/to/webroot   Specifies the web root folder for web root mode.
   --standalone                      Use standalone mode.
   --alpn                            Use standalone alpn mode.
@@ -6225,8 +6225,8 @@ Parameters:
   --dns [dns_cf|dns_dp|dns_cx|/path/to/api/file]   Use dns mode or dns api.
   --dnssleep  [$DEFAULT_DNS_SLEEP]                  The time in seconds to wait for all the txt records to take effect in dns api mode. Default $DEFAULT_DNS_SLEEP seconds.
 
-  --keylength, -k [2048]            Specifies the domain key length: 2048, 3072, 4096, 8192 or ec-256, ec-384.
-  --accountkeylength, -ak [2048]    Specifies the account key length.
+  --keylength, -k [2048]            Specifies the domain key length: 2048, 3072, 4096, 8192 or ec-256, ec-384, ec-521.
+  --accountkeylength, -ak [2048]    Specifies the account key length: 2048, 3072, 4096
   --log    [/path/to/logfile]       Specifies the log file. The default is: \"$DEFAULT_LOG_FILE\" if you don't give a file path here.
   --log-level 1|2                   Specifies the log level, default is 1.
   --syslog [0|3|6|7]                Syslog level, 0: disable syslog, 3: error, 6: info, 7: debug.
@@ -6240,7 +6240,7 @@ Parameters:
 
   --reloadcmd \"service nginx reload\" After issue/renew, it's used to reload the server.
 
-  --server SERVER                   ACME Directory Resource URI. (default: https://acme-v01.api.letsencrypt.org/directory)
+  --server SERVER                   ACME Directory Resource URI. (default: $DEFAULT_CA)
   --accountconf                     Specifies a customized account config file.
   --home                            Specifies the home dir for $PROJECT_NAME.
   --cert-home                       Specifies the home dir to save all the certs, only valid for '--install' command.